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1. 发明公开

EP0067767A2 Digital induction logging technique 失效
标题翻译： Digitale Induktions-Bohrlochmessung。
公开(公告)号：EP0067767A2
公开(公告)日：1982-12-22
申请号：EP82401034.2
申请日：1982-06-08
申请人： SCHLUMBERGER LIMITED , SOCIETE DE PROSPECTION ELECTRIQUE SCHLUMBERGER
发明人： Sinclair, Paul L.
IPC分类号： G01V3/28 , G01V3/38
CPC分类号： G01V3/28 , G01V3/38
摘要： A digital induction resistivity logging tool is disclosed for digitally measuring both the in-phase (R) and quadrature (X) phase components in a receiver signal generated in response to transmitter induced currents flowing in the earth's subsurface formations. The digital induction tool includes a digital sinewave generator for generating a highly phase stable, low distortion transmitter signal, the frequency of which is selectable from among a plurality of transmitter frequencies. One phase sensitive detector is used alternately to detect both the R and the X phase component signals. Automatic phase compensation is included to periodically compensate for both static and dynamic temperature dependent phase shift errors due to circuits of the tool involved in the component measurements. A floating point analog-to-digital converter capable of handling the wide dynamic range in the detected phase component signals is provided to convert the phase detector output into digital signals. Selection of the transmitter frequency may be based on optimizing the measurement of the characteristic of the formations being encountered by the tool. A linearization correction function is obtained periodically for the tool transfer function as the tool is being used in normal logging operations. The function is then applied to measurements taken subsequently.
摘要翻译：公开了一种数字感应电阻测井仪，用于数字测量响应于在地球地下地层中流动的发射机感应电流产生的接收机信号中的同相（R）和正交（X）相位分量。数字感应工具包括数字正弦波发生器，用于产生高相位稳定的低失真发射机信号，其频率可从多个发射机频率中选择。交替使用一个相位敏感检测器来检测R和X相分量信号。包括自动相位补偿，以定期补偿由于组件测量中涉及的刀具电路造成的静态和动态温度相关误差。提供能够处理检测到的相位分量信号中的宽动态范围的浮点模数转换器，以将相位检测器输出转换为数字信号。发射机频率的选择可以基于优化工具遇到的地层特征的测量。在正常测井操作中使用刀具时，可以为刀具传递功能定期获得线性化校正功能。然后将该功能应用于随后进行的测量。

2. 发明授权

EP0067767B1 Digital induction logging technique 失效
标题翻译：数字电感测井技术
公开(公告)号：EP0067767B1
公开(公告)日：1987-04-08
申请号：EP82401034.2
申请日：1982-06-08
申请人： SCHLUMBERGER LIMITED , SOCIETE DE PROSPECTION ELECTRIQUE SCHLUMBERGER
发明人： Sinclair, Paul L.
IPC分类号： G01V3/28 , G01V3/38
CPC分类号： G01V3/28 , G01V3/38

3. 发明公开

EP0067767A3 Digital induction logging technique 失效
标题翻译：数字电感测井技术
公开(公告)号：EP0067767A3
公开(公告)日：1983-11-16
申请号：EP82401034
申请日：1982-06-08
申请人： SCHLUMBERGER LIMITED , SOCIETE DE PROSPECTION ELECTRIQUE SCHLUMBERGER
发明人： Sinclair, Paul L.
IPC分类号： G01V03/28 , G01V03/38
CPC分类号： G01V3/28 , G01V3/38
摘要： A digital induction resistivity logging tool is disclosed for digitally measuring both the in-phase (R) and quadrature (X) phase components in a receiver signal generated in response to transmitter induced currents flowing in the earth's subsurface formations. The digital induction tool includes a digital sinewave generator for generating a highly phase stable, low distortion transmitter signal, the frequency of which is selectable from among a plurality of transmitter frequencies. One phase sensitive detector is used alternately to detect both the R and the X phase component signals. Automatic phase compensation is included to periodically compensate for both static and dynamic temperature dependent phase shift errors due to circuits of the tool involved in the component measurements. A floating point analog-to-digital converter capable of handling the wide dynamic range in the detected phase component signals is provided to convert the phase detector output into digital signals. Selection of the transmitter frequency may be based on optimizing the measurement of the characteristic of the formations being encountered by the tool. A linearization correction function is obtained periodically for the tool transfer function as the tool is being used in normal logging operations. The function is then applied to measurements taken subsequently.

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